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CVE-2026-77100

Estado: RecibidaAlta (8.7)—

MediaAgent contenía un problema de desbordamiento de búfer basado en el montículo (heap) que afecta a la disponibilidad del servicio. Los clientes del software deben actualizar a la versión de mantenimiento que resuelve el problema. Actualice la instalación de Commvault de los MediaAgents y de HyperScale.

Traducción automática del texto original de NVD (en inglés).

CVSS

Probabilidad de explotación (EPSS)

FIRST aún no ha puntuado esta CVE (habitual en CVEs muy recientes o rechazadas).

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vector AV:N/PR:N/UI:N con VA:H y desbordamiento de búfer en heap que afecta a la disponibilidad de MediaAgent; el texto no indica ejecución de código.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (2)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Commvault — HyperscaleAICommvault — MediaagentAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-77100",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-77100",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-10-13T14:41:16.105259Z"
        }
      }
    ],
    "cvssMetricV40": [
      {
        "type": "Secondary",
        "source": "050066fd-a2f9-4f32-ab5d-4c53f48bc333",
        "cvssData": {
          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
          "baseScore": 8.7,
          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "exploitMaturity": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "NONE",
          "subIntegrityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "vulnAvailabilityImpact": "HIGH",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "subConfidentialityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "confidentialityRequirement": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
        }
      }
    ]
  },
  "affected": [
    {
      "source": "050066fd-a2f9-4f32-ab5d-4c53f48bc333",
      "affectedData": [
        {
          "vendor": "Commvault",
          "product": "Commvault Cloud",
          "versions": [
            {
              "status": "affected",
              "changes": [
                {
                  "at": "11.46.30",
                  "status": "unaffected"
                }
              ],
              "version": "11.46.0",
              "versionType": "custom",
              "lessThanOrEqual": "11.46.29"
            },
            {
              "status": "affected",
              "changes": [
                {
                  "at": "11.44.25",
                  "status": "unaffected"
                }
              ],
              "version": "11.44.0",
              "versionType": "custom",
              "lessThanOrEqual": "11.44.24"
            },
            {
              "status": "affected",
              "changes": [
                {
                  "at": "11.40.78",
                  "status": "unaffected"
                }
              ],
              "version": "11.40.0",
              "versionType": "custom",
              "lessThanOrEqual": "11.40.77"
            },
            {
              "status": "affected",
              "changes": [
                {
                  "at": "11.36.127",
                  "status": "unaffected"
                }
              ],
              "version": "11.36.0",
              "versionType": "custom",
              "lessThanOrEqual": "11.36.126"
            }
          ],
          "platforms": [
            "Windows",
            "Linux"
          ],
          "defaultStatus": "unknown"
        }
      ]
    }
  ],
  "published": "2026-10-13T15:17:49.650",
  "references": [
    {
      "url": "https://documentation.commvault.com/securityadvisories/CV_2026_10_6.html",
      "source": "050066fd-a2f9-4f32-ab5d-4c53f48bc333"
    }
  ],
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
          "lang": "en",
          "value": "CWE-122"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "MediaAgent contained a heap-based buffer overflow issue affecting service availability.  Software customers upgrade to resolved maintenance release. Update Commvault installation of MediaAgents and HyperScale."
    }
  ],
  "lastModified": "2026-10-13T15:17:49.650",
  "sourceIdentifier": "050066fd-a2f9-4f32-ab5d-4c53f48bc333"
}